CVE-2026-79312 Auth bypass in n/a
Attackers can hijack user sessions by fixing the session ID, leading to account takeover in applications using web.py.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-79312?
CVE-2026-79312 is a medium-severity authentication bypass vulnerability in n/a, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
webpy web.py 0.76 is vulnerable to Session Fixation. The component Session._load() reads session_id directly from the request cookie and loads that session from the store, and _save() writes back under the same session_id; no rotation after authentication, so a fixed session_id keeps the authenticated state.
Weakness: CWE-384
Which versions are affected by CVE-2026-79312?
How do I fix CVE-2026-79312?
No fix has been published for CVE-2026-79312 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-79312 being exploited?
There is no known exploitation of CVE-2026-79312 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-79312, GHSA-wpfv-47p6-jfvh, UBUNTU-CVE-2026-79312.